Jack.



H. E. MAURER, In.

JACK.

APPLICATION FILED APR 24. 1918.

Patented Dec. 17,1918.

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rrnp STATES FATE onrron.

HENRY E. MAUREB, JR., 0F SPRINGFIELD, ILLINOIS, ASSIGNOR 0F ONE-HALF TO HARRY L. IDE, OF SPRINGFIELD, ILLINOIS.

JACK.

Specification of Letters Patent. Patented Dec, 17, 1918,

Application filed April 24, 1918. Serial No. 230,427.

To all whom it may concern:

Be it known that I, HENRY E. MAURER, J11, a citizen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois, have invented a certain new and useful Improvement in J acks, of which the following is a full, clear, concise, and exact description.

My invention relates to jacks used for lifting or otherwise moving objects. The jack of my invention is of particular use in compressing the springs employed in the operation of puppet valves in order that the valves may readily be removed and cleaned, ground, or reseated, though the invention is not to be limited to this use.

My invention has for one of its objects the provision of a construction whereby a jack may readily be applied to valves or other objects of different locations and environments which hitherto required jacks of different designs adaptable to the varying work. The jack of my invention enables me to operate in cramped spaces which would not accommodate jacks with oscillating ratchet members.

The invention has for another object the provision of a construction whereby the effective length or height of a jack may be adjusted to suit the locality where it is employed. In carrying out the first object of my invention 1 construct the jack with a rod, a load engaging element supported by the rod, a member projecting from the rod and movable with the load engaging element longitudinally of the axis of the rod and angularly adjustable with respect to the load engaging element, and mechanism co-acting with the rod for effecting movement of said load engaging element and member longitudinally of the rod axis and including an actuating element movable with respect to and bodily with said member and operable with the load engaging element and member in relatively fixed positions.

In carrying out the second object of my invention a base that carries the rod is movable longitudinally of the rod, being preferably threaded upon the rod, the rod desirably passing through the base whereby the effective height or length of the jack (which is measured between the base and one end of the rod) may readily be adjusted.

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure l is a view showing the jack of my invention partially broken away and adjusted in position to lift a spring abutment or washer at the lower end of a valve spring, a position to which the jack is adjusted to lift the washer being indicated by dotted lines; Fig. 2 is'alongitudinal sectional view of the jack; and Fig. 3 is asectional View on line 33 of Fig. 2, an alternative position of a fork member of the jack and the parts. carried thereby being indicated by dotted lines.

Like parts are indicated by similar characters of reference throughout the difler'ent figures.

The drawing illustrates one use to which the jack may be put, Fig. 1 showing a portion 1 of a cylinder and a part 2 of the removable cylinder head. The valve 3 may be either an inlet or an exhaust valve, this valve having a seat 4: in the engine cylinder. The usual valve stem 5 projects downwardly from the valve 3 and through the valve stem guide 6 carried by the engine cylinder. An abutting washer 7 is assembled with the stem 5 at the lower end of the stem by means of the usual key 8 passing through a transverse hole in the stem. The valve spring 9 is in abutting engagement, at its upper end, with the guide structure 6 and at its lower end with the washer 7, the key 8 limiting the extent to which the washer may be depressed by the spring and being so located as to maintain the spring under compression. The washer may be moved, upon the application of sufficient lifting force, along the stem and away from the key 8.

The jack structure illustrated includes a threaded rod 10 and a base 11 that carries the rod. This base is preferably of fork shape so that it may readily straddle the nut 12 that is employed to clamp the post 13 in engagement with the plunger 14 whereby the base may be firmly seated uponthe plun ger guiding portion of the engine cylinder structure. The portion or branch 15 of a fork or oscillating member 16 carries a sleeve 17. The other branch 18 of this fork carries a sleeve 19. These sleeves are alined and the rod passes freely therethrough whereby the fork is journaled on and is movable along said rod. The loadsupporting member is preferably in the nature of' an arm .20 that has two substantially parallel branches 2 1, 22 which respectively surround the sleeves 17 and 19,that have bearing engagement with said branches whereby said fork may be swung to difierent angles re"- specting said arm and, as the sleeves are free of threaded engagement with the rod so that the fork may be freely movable longie tudinally of the rod, the fork will follow the movements of the arm without-disturb ing the angular selected adjustment of the fork with respect to the arm. An alternative'angula-r position o-f'the' fork and parts carried thereby isindicated by dotted lines inFi'g. 3. Thetwo branches-21 and 22 prevent. the arm from being tilted with respect tethered-10'. Said arm is preferably of fork shape at its outer and workengaging endwhere-it is alined with the forked end of the-base 1 1'. By making thisend of the arm fork-shaped itmay readily straddle the valve stem ancl clear' the key 8 wliereby'the arm may have direct" lifting, engagement with the spring engaging washer 7 to be able toeffect the-movement of this washer away from' the'key. Thebevelpinion-23 is interposed between the branches and 18 of the fork 16 andis in threaded engagement with t'he-rod10,-the topface of this pinion being in thrusting. engagement with the inner face of the branch 15 whereby the fork'16 and the arm 20 are elevated when the pinion 23 moved upwardly.

In orderit'oprevent the threads in the pinion 23*fromstripping, this pinion desirably has an lb gatcd" hub 23 in which the threads of the pinion are continued. This hub desirably extends substantially" into contact with the inner face ofth'e branch 18 of the fork 16 to prevent the said pinion from having binding engagement with the second or actuating bevel pinion 246' which is also disposed between the branches of the fork 16 inposition" to be in mesh with the first pinion w An operating shaft 25 is journaled in the stem 26'of the fork 16 and isbrought into turning connection with the second pinion by means of a" pin 27 passing through the shaft and thehubo'fthis pinion. The outer of the shaft may be providedwith a wing-head 28;: pin QQ'holding the" wing head: and shaft in fixed relation. The two pins 27 and 29 preservea fixed space be tween the pinion=24 and the head 28, the

tem ofithe'; fork" 16- being. snuely received this-space but without binding engagement with:- said pinion" and head. Whenthe j ack isinitiallyinserted inthe position illustrated-: by full lines Fig. 1- the head 28 is tii ri'i'ed in direction-to eflectelevation of 20'- Whereby the washer 7 is lifted from; the key" 8* wherea-fter this key may readily be withdrawn to permit removal of the valve,-whichremoval may be eifeeted, where the. removable cylinder head 2 is employed, after such cylinder head has been removed. After the valve has beenvremoved and attended to, the arm" 20 remaining in its elevated position, the valve may readily be replaced and the key 8 reinserted whereafter said arm 20 is lowered by reverse rotation of the wing head 28. If the opening 30 in the engine cylinder structure, through which opening the jack is to be inserted to apply it to the valve Washer, is not so located as to permit the fork 16 to occupy the position with respect to the arm 20 indicated by fulllines in the dr'awing,.the fork may be swung arou-ndto occupy" any other position with respect to this arin to suit the locationof such opening, another alternative position of this fork and the parts carried thereby being indicated in. Fig. 8. After the desired. angular adjustment of-the fork with respect to'the arm has beenv secured, the jackis" operated merel-y by turning the wing head and the shaft fixed with respect thereto upon an axis that is then fiXedin one plane so that the jackmay be manipulated in cramped spaces thereby possessing material advantage over jacks employing oscillating ratchet members that could not be employed in the same locations.

It will be observed that theforked endof the arm 20 is in the same plane with oneof the branches of thearm thereby providing appreciable space between this forked end and the plane oftheother branch. By this construction the? arm and co-a'ctingi parts may be" reversed in position upon the rod initially to adapt the jack to thespace' be low the washer which varies in difierent makes of engines.

The rod 10 and the base 11 are desirably in threaded engagement,- the rod passing through the base so that the distance between the base and the" top of the ro'd'may readily be adjusted to regulate the effective hcight'of the j a'ck whereby the lengtho'fthe jack may be adjusted to" have it insertible within difi erent spaces. A set nut 31- serves to clamp the base in the" position to which it is'adjusted along the rod; While this feature of my invention is embodied in a jack having the other details of const ue tion set forth I do not wish to limit this feature or the invention tn a jack having such other characteristics? 7 1 While I have herein shown and partieslarly described the-preferred embodiment of my invention I do notwish tobelim'itdto the precise details" of construction shown as changes may readily be made without d'e' parting from the scope" of the appended claims; but having thus" described m invert:

tion I claim asnew and desire to-sec'ureby Letters Patent the following 1. A jack including a threaded and; a fork havingtwo branches each carrying a sleeve that is alined with the sleeve" carried by the other branch, said rod passing freely through said sleeves whereby the fork is journaled upon and is movable along said rod; a load engaging element supported by the rod and having two branches with which said sleeves are in bearing engagement whereby said fork may be swung to different angles respecting said load engaging element; a bevel pinion interposed between the branches of the fork and in threaded enga gement with said rod and in thrusting engagement with a branch of said fork; a second bevel pinion between the branches of the fork and in mesh with the aforesaid pinion; and an operating shaft journaled in the stem of the fork and in turning connection with the second bevel pinion.

2. A jack including a threaded rod; a fork having two branches each carrying a sleeve that is alined with the sleeve carried by the other branch, said rod passing freely through said sleeves whereby the fork is journaled upon and is movable along said rod; a load engaging element supported by the rod and in bearing engagement with said fork whereby said fork may be swung to different angles respecting said load engaging element; a bevel pinion interposed between the branches of the fork and in threaded engagement with said rod and in thrusting engagement with a branch of said fork; a second bevel pinion between the branches of the fork and in mesh with the aforesaid pinion; and an operating shaft journaled in the stem of the fork and in turning connection with the second bevel pinion.

3. A jack including a threaded rod; a member having a portion carrying a sleeve, through which sleeve said rod freely passes whereby said member is journaled upon and is movable along said rod; a load engaging element supported by the rod and in bearing engagement with said member whereby said member may be swung to different angles respecting said load engaging element, a bevel pinion in thrusting engagement with said portion of said member and in threaded engagement with said rod; a second bevel pinion in mesh with the aforesaid pinion; and an operating shaft journaled in said member and in turning connection with the second bevel pinion.

A. A jack including a threaded rod; a load engaging element supported by the rod; a member projecting from said rod, this member being freely movable longitudinally of the rod and in swinging relation to said load engaging element to permit of the angular adjustment of said member with respect to the load engaging element; a bevel pinion in thrusting engagement with said member and in threaded engagement with said rod; a second bevel pinion in mesh with the aforesaid pinion; and an operating shaft journaled in said member and in turning connection with the'second bevel pinion.

5. A jack including a rod; a load engaging element supported by the rod; a member projecting from the rod and movable with the load engaging element longitudinally of the aXis of the rod and angularly adjustable with respect to the load engaging element; and mechanism co-acting with the rod for effecting movement of said load engaging element and member longitudinally of the rod axis and including an actuating element movable with respect to and bodily with said member and operable with the load engaging element and member in relatively fixed positions.

In witness whereof, I hereunto subscribe my name this 20 day of April A. D., 1918.

HENRY E. MAURER, JR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

